Method of improving blade folding rate at loose rehydrated exit and applications

Abstract

The present application relates to the cigarette processing technical field, especially to a kind of method for improving the folding rate of loose moisture recovery outlet leaf and application, the method includes the following steps: S1.to the leaf is vacuumed, and the vacuumed moisture is recovered, and the vacuumed moisture recovery time is 7-8min;S2.to the leaf after vacuumed moisture recovery is loose, and the temperature of circulating hot air is 52-58 DEG C when loose moisture recovery time.It is to improve the folding rate of leaf in loose moisture recovery process by controlling the time of vacuumed moisture recovery and the temperature of hot air when loose moisture recovery, can reduce the folding number of leaf, so that leaf can be more uniform to sugar material absorption, it is beneficial to improve the quality of leaf.Compared with the processing cycle of traditional vacuumed moisture recovery and loose moisture recovery temperature, the average folding rate of leaf can be reduced from 30.63% to 13.88%, not only can save processing time, but also can save steam cost.

Description

Technical Field

[0001] This invention relates to the field of cigarette processing technology, and in particular to a method and application for improving the leaf folding rate at the loose, rehydrated outlet. Background Technology

[0002] The cigarette manufacturing process involves numerous steps. Among these, the leaf loosening and rehydration process primarily aims to increase the moisture content and temperature of the tobacco leaves, thereby improving their processing resistance and making the sliced ​​leaves looser. However, in actual processing, it has been observed that some leaves at the loosening and rehydration exit are not fully unfolded (leaf folding occurs). Figure 1 This type of folded tobacco sheet hinders the absorption of sugars during subsequent processing, thus affecting the product's intrinsic quality. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method and application for improving the leaf folding rate at the loose rehydration outlet, which can effectively improve the leaf folding rate in the loose rehydration process, reduce the number of leaf folds, thereby enabling the leaves to absorb sugar more evenly and improving the quality of the leaves.

[0004] The present invention solves the above-mentioned technical problems through the following technical means:

[0005] A method for improving the leaf folding rate at a loose, rehydrated outlet includes the following steps:

[0006] S1. Vacuum rehydration of the blades, the vacuum rehydration process lasting 7-8 minutes;

[0007] S2. Loosen and rehydrate the blades after vacuum rehydration, wherein the temperature of the circulating hot air during loosening and rehydration is 52-58℃.

[0008] Based on the aforementioned technical methods, by controlling the time during vacuum rehydration and the hot air temperature during loose rehydration, the folding rate of the leaves in the loose rehydration process can be improved, reducing the number of folds. This allows the leaves to absorb sugar more evenly, thus improving leaf quality. Compared to the traditional vacuum rehydration process and loose rehydration temperature, the average folding rate of the leaves can be reduced from 30.63% to 13.88%, saving not only processing time but also steam costs.

[0009] Preferably, in step S1, during vacuum rehydration, after one vacuuming, the vacuum level is stopped at 1-3 kPa.

[0010] According to the above-mentioned technical means, by reducing the vacuum pressure to 1-3 kPa during vacuum rehydration, it is beneficial to unfold the folded parts of the blades, thereby reducing the folding rate of the blades.

[0011] Preferably, after one vacuuming operation, the increase in vacuum level is stopped, and then water and steam are added simultaneously.

[0012] According to the above-mentioned technical means, after vacuuming, adding water and steam further facilitates the unfolding of the folded blades. At the same time, it can warm and humidify the blades, which is convenient for subsequent processing.

[0013] A further preferred embodiment is that when adding water, the vacuum level is increased to 50 kPa, and then the water addition is stopped.

[0014] A further preferred embodiment is that when adding steam, the vacuum level is increased to 55 kPa, and then the steam addition is stopped.

[0015] Preferably, after the steam addition step, a pressure holding operation is performed for 40-60 seconds.

[0016] A further preferred setting is a pressure holding time of 50 seconds.

[0017] Based on the above technical means, the pressure is maintained to further promote the absorption of temperature and moisture by the leaves and diffuse them into the leaves inside the tobacco block, so as to achieve the purpose of rapid rehydration of the leaves and help the leaves to expand again after absorbing temperature and moisture.

[0018] Preferably, after the pressure holding operation, a vacuum is drawn and the vacuum level is stopped at 19-21 kPa.

[0019] Further preferred, the stop vacuum level is 20 kPa.

[0020] According to the above technical means, after maintaining the pressure, the vacuum pressure is reduced again, which is beneficial to the shaping of the unfolded blades and reduces the chance of overlapping again.

[0021] Preferably, in step S2, during the loosening and rehydration process, process water and hot steam are added simultaneously.

[0022] More preferably, when adding hot steam, it is added through a nozzle at a steam pressure of 0.2 MPa.

[0023] More preferably, the steam addition amount is 2.0-3.0L / 100kg.

[0024] Further preferably, the amount of process water added is 2.5-4.5L / 100kg.

[0025] Based on the above technical means, by controlling the addition of steam and process water, the moisture content of the blades is increased again while promoting the unfolding of the blades, so that the blades can be fully unfolded as much as possible after the two processes.

[0026] Preferably, the method further includes a method for determining the blade folding rate, the method comprising the following steps:

[0027] Loose, damp leaves were randomly sampled, and folded leaves were selected, weighed, and the percentage of folded leaves in the total sample was calculated.

[0028] More preferably, the weight of the sample is at least 1 kg during random sampling.

[0029] The above-mentioned technical methods help ensure the reliability of the samples.

[0030] More preferably, when screening folded blades, blades with an overlap area of ​​more than one-third are considered folded blades.

[0031] Based on the aforementioned technical means, it was found during the production process that when the overlapping area of ​​the blades exceeds one-third, it has a significant impact on the absorption of sugar by the blades, affecting the intrinsic quality of the product. Therefore, blades with an overlapping area exceeding one-third are defined as folded blades.

[0032] This application also discloses an application of a method for improving the folding rate of blades at the loose rehydration outlet, used for treating blades using vacuum rehydration and loose rehydration processes.

[0033] The aforementioned technical methods can improve the leaf folding rate, thereby improving the absorption of sugars by the leaves, and consequently improving the physical, chemical, and sensory properties of tobacco leaves.

[0034] The present application, employing the above-described scheme, has the following advantages:

[0035] 1. This application defines the meaning of folded tobacco leaves for the first time. Folded leaves are defined as leaves with an overlapping area of ​​more than one-third after vacuum rehydration and loose rehydration treatment. By optimizing the vacuum rehydration and loose rehydration treatment methods, the folding rate of leaves can be effectively improved and the number of folds can be reduced, so that the leaves can absorb sugar more evenly and thus improve the quality of the leaves.

[0036] 2. By optimizing the tobacco leaf processing methods during vacuum rehydration and loose rehydration, not only was the leaf folding rate reduced, but the absorption and utilization rate of added sugars and the intrinsic quality of the product were improved, while also saving energy and increasing production efficiency.

[0037] 3. This application improves the physical, chemical and sensory properties of tobacco by improving the leaf folding rate, and can be used for various tobacco leaves, making it suitable for widespread application. Attached Figure Description

[0038] This application can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0039] Figure 1 This is a blade folding diagram in the background art of this application. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] In this embodiment of the application, the production process using the A brand's mass-produced leaf group formula is taken as an example, wherein the water and process water used are both soft water.

[0042] Example 1: A method for improving the leaf folding rate at the loose, rehydrated outlet.

[0043] Includes the following steps:

[0044] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0045] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 1 kPa.

[0046] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0047] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0048] S14. After the pressure holding operation, perform vacuuming and stop the vacuum at 20 kPa;

[0049] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 52℃.

[0050] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0051] S22. When adding process water during hot air circulation, the amount of process water added is 4.5L / 100kg;

[0052] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0053] Example 2, Method Two for Improving the Leaf Folding Rate at Loose Re-moistening Outlets

[0054] Includes the following steps:

[0055] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0056] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 1 kPa.

[0057] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0058] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0059] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0060] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 55℃.

[0061] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a quantity of 2.5 L / 100 kg.

[0062] S22. When adding process water during hot air circulation, the amount of process water added is 4.5L / 100kg;

[0063] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0064] Example 3, Method Three for Improving the Leaf Folding Rate at Loose Re-moistening Outlets

[0065] Includes the following steps:

[0066] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0067] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 1 kPa.

[0068] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0069] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0070] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0071] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 58℃.

[0072] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 3.0 L / 100 kg.

[0073] S22. When adding process water during hot air circulation, the amount of process water added is 4.5L / 100kg;

[0074] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0075] Example 4, Method 4 for improving the leaf folding rate at the loose, rehydrated outlet

[0076] Includes the following steps:

[0077] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0078] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 2 kPa.

[0079] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0080] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0081] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0082] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 52℃.

[0083] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0084] S22. When adding process water during hot air circulation, the amount of process water added is 2.5L / 100kg;

[0085] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0086] Example 5: Method Five for Improving the Leaf Folding Rate at Loose Re-moistening Outlets

[0087] Includes the following steps:

[0088] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0089] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 2 kPa.

[0090] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0091] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0092] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0093] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 55℃.

[0094] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0095] S22. When adding process water during hot air circulation, the amount of process water added is 3.0L / 100kg;

[0096] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0097] Example 6, Method 6 for improving the folding rate of blades at the loose, rehydrated outlet

[0098] Includes the following steps:

[0099] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0100] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 2 kPa.

[0101] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0102] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0103] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0104] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 58℃.

[0105] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0106] S22. When adding process water during hot air circulation, the amount of process water added is 3.5L / 100kg;

[0107] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0108] Example 7, Method Seven for Improving the Leaf Folding Rate at Loose Re-moistening Outlets

[0109] Includes the following steps:

[0110] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0111] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 3 kPa.

[0112] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0113] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0114] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0115] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 52℃.

[0116] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0117] S22. When adding process water during hot air circulation, the amount of process water added is 4.0L / 100kg;

[0118] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0119] Example 8: A method for improving the folding rate of blades at the loose, rehydrated outlet.

[0120] Includes the following steps:

[0121] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0122] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 3 kPa.

[0123] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0124] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0125] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0126] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 55℃.

[0127] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a dosage of 2.0 L / 100 kg.

[0128] S22. When adding process water during hot air circulation, the amount of process water added is 4.5L / 100kg;

[0129] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0130] Example 9, Method for improving the leaf folding rate at the loose, rehydrated outlet

[0131] Includes the following steps:

[0132] S1. Vacuum rehydration of the blades is carried out. During vacuum rehydration, one cycle of processing is performed, with a processing time of 451 seconds.

[0133] S11. During a processing cycle, a vacuum is first applied, and the vacuum level is stopped at 3 kPa.

[0134] S12. After one vacuuming, stop increasing the vacuum level, and then add water and steam simultaneously. When adding water, increase the vacuum level to 50 kPa, and then stop adding water. When adding steam, increase the vacuum level to 55 kPa, and then stop adding steam.

[0135] S13. After the steam addition step, perform a pressure holding operation for 50 seconds;

[0136] S14. After the pressure holding operation, perform vacuuming and stop the vacuum level at 20 kPa;

[0137] S2. Loosen and rehydrate the blades after vacuum rehydration. During loosening and rehydration, the temperature of the circulating hot air is 58℃.

[0138] S21. During hot air circulation, hot steam and process water are added simultaneously. When adding hot steam, it is added through a nozzle at a pressure of 0.2 MPa and a quantity of 2.5 L / 100 kg.

[0139] S22. When adding process water during hot air circulation, the amount of process water added is 3.5L / 100kg;

[0140] S3. Determine the leaf folding rate; Randomly sample 1 kg of loose, rehydrated leaves, and select folded leaves with an overlap area of ​​more than one-third, weigh them, and calculate the percentage of folded leaves in the total sample to determine the leaf folding rate.

[0141] The folding rates of the blades in Examples 1-9 were calculated, and the results are shown in Table 1:

[0142]

[0143] According to the above data, when the vacuum level is 2 kPa and the temperature of the loosening and rehydration circulating hot air is 58°C, the folding rate of the blades can be reduced to 13.88%. Reducing the number of folds in the blades allows for more uniform absorption of sugar by the blades, which is beneficial to improving the quality of the blades.

[0144] Range analysis was performed on the folding rates obtained in Examples 1-9, and the results are shown in Table 2 below:

[0145]

[0146] Based on the above data, it can be seen that the vacuum level after a single vacuuming operation is the main influencing factor, while the temperature of the circulating hot air for moisture dissipation is a secondary influencing factor.

[0147] Analysis of variance was performed on the folding rates obtained in Examples 1-9, and the results are shown in Table 3 below:

[0148]

[0149] Based on the above data, the P-values ​​for the vacuum level at the end of a single vacuuming cycle and the hot air temperature during the loosening and rehydration circulation are 0.016 and 0.019, respectively. This indicates that the significance level difference is below 0.05, demonstrating that both the vacuum level at the end of a single vacuuming cycle and the hot air temperature during the loosening and rehydration circulation have a significant impact on the blade folding rate. This is consistent with the results expressed by the data in Table 1.

[0150] Using the conditions described in Example 6, trial production of cigarettes was conducted, and the smoke indicators of the produced cigarettes were evaluated. The evaluation results are shown in Table 4 below:

[0151]

[0152] Based on the above data, it can be seen that the cigarettes produced under the conditions of Example 6 can improve the physical, chemical and sensory properties of the cigarettes, can be used for various tobacco leaves, and are suitable for widespread application.

[0153] The above provides a detailed description of a method and its application for improving the folding rate of blades at a loose, rehydrated outlet, as provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0154] It should be noted that: for experimental steps or conditions not specified in the examples, the procedures and conditions described in conventional experimental procedures in the literature of this art can be followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0155] The above examples are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by anyone under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the scope of protection of the present invention.

Claims

1. A method for improving the leaf folding rate at a loose, rehydrated outlet, characterized in that, Includes the following steps: S1. Vacuum rehydration of the blades, the vacuum rehydration process lasting 7-8 minutes; S2. Loosen and rehydrate the blades after vacuum rehydration, wherein the temperature of the circulating hot air during loosening and rehydration is 52-58℃; In step S1, during vacuum rehydration, after one vacuuming, the vacuum level is stopped at 1-3 kPa. After one vacuuming operation, stop increasing the vacuum level, and then simultaneously add water and steam. After the steam addition step, a pressure holding operation is performed for 40-60 seconds. After the pressure holding operation, a vacuum is drawn and the vacuum level is stopped at 19-21 kPa. In step S2, during the loosening and rehydration process, process water and hot steam are added simultaneously. Folding blades are defined as those with an overlap area exceeding one-third.

2. The method according to claim 1, characterized in that, The method also includes a method for determining the blade folding rate, the method comprising the following steps: Loose, damp leaves were randomly sampled, and folded leaves were selected, weighed, and the percentage of folded leaves in the total sample was calculated.

3. The method according to claim 2, characterized in that, When selecting folded blades, blades with an overlap area of ​​more than one-third are considered folded blades.

4. An application of the method for improving the leaf folding rate at the loose, rehydrated outlet as described in any one of claims 1-3, characterized in that, The method described above for improving the blade folding rate at the loose rehumidification outlet is used to treat blades that employ both vacuum rehumidification and loose rehumidification processes.

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